forked from mirrors/stickerpicker
109 lines
3.3 KiB
JavaScript
109 lines
3.3 KiB
JavaScript
// Copyright (c) 2020 Tulir Asokan
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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import { html, render, Component } from "https://unpkg.com/htm/preact/index.mjs?module"
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import { Spinner } from "./spinner.js"
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import { sendSticker } from "./widget-api.js"
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// The base URL for fetching packs. The app will first fetch ${PACK_BASE_URL}/index.json,
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// then ${PACK_BASE_URL}/${packFile} for each packFile in the packs object of the index.json file.
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const PACKS_BASE_URL = "packs"
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// This is updated from packs/index.json
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let HOMESERVER_URL = "https://matrix-client.matrix.org"
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const makeThumbnailURL = mxc => `${HOMESERVER_URL}/_matrix/media/r0/thumbnail/${mxc.substr(6)}?height=128&width=128&method=scale`
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class App extends Component {
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constructor(props) {
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super(props)
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this.state = {
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packs: [],
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loading: true,
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error: null,
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}
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this.observer = null
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}
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observeIntersection = intersections => {
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for (const entry of intersections) {
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const img = entry.target.children.item(0)
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if (entry.isIntersecting) {
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img.setAttribute("src", img.getAttribute("data-src"))
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img.classList.add("visible")
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} else {
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img.removeAttribute("src")
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img.classList.remove("visible")
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}
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}
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}
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componentDidMount() {
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fetch(`${PACKS_BASE_URL}/index.json`).then(async indexRes => {
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if (indexRes.status >= 400) {
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this.setState({
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loading: false,
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error: indexRes.status !== 404 ? indexRes.statusText : null,
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})
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return
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}
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const indexData = await indexRes.json()
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HOMESERVER_URL = indexData.homeserver_url || HOMESERVER_URL
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// TODO only load pack metadata when scrolled into view?
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for (const packFile of indexData.packs) {
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const packRes = await fetch(`${PACKS_BASE_URL}/${packFile}`)
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const packData = await packRes.json()
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this.setState({
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packs: [...this.state.packs, packData],
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loading: false,
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})
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}
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}, error => this.setState({ loading: false, error }))
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this.observer = new IntersectionObserver(this.observeIntersection, {
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rootMargin: "100px",
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threshold: 0,
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})
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}
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componentDidUpdate() {
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for (const elem of document.getElementsByClassName("sticker")) {
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this.observer.observe(elem)
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}
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}
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componentWillUnmount() {
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this.observer.disconnect()
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}
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render() {
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if (this.state.loading) {
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return html`<div class="main spinner"><${Spinner} size=${80} green /></div>`
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} else if (this.state.error) {
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return html`<div class="main error">
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<h1>Failed to load packs</h1>
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<p>${this.state.error}</p>
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</div>`
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} else if (this.state.packs.length === 0) {
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return html`<div class="main empty"><h1>No packs found :(</h1></div>`
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}
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return html`<div class="main pack-list">
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${this.state.packs.map(pack => html`<${Pack} id=${pack.id} ...${pack}/>`)}
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</div>`
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}
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}
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const Pack = ({ title, stickers }) => html`<div class="stickerpack">
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<h1>${title}</h1>
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<div class="sticker-list">
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${stickers.map(sticker => html`
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<${Sticker} key=${sticker["net.maunium.telegram.sticker"].id} content=${sticker}/>
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`)}
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</div>
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</div>`
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const Sticker = ({ content }) => html`<div class="sticker" onClick=${() => sendSticker(content)}>
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<img data-src=${makeThumbnailURL(content.url)} alt=${content.body} />
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</div>`
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render(html`<${App} />`, document.body)
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